How to use Physical Ethernet Port [update]

LXD
1

Hi! Im trying to create a new network.

lxc network create routerout parent=enp2s0f0

error:
Error: Invalid option for network “routerout” option “parent”

when I try to add the physical port directly to the LXD vm im getting this
lxc config device add routeros eth1 nic nictype=network parent=enp2s0f0 name=eth1

error:
Invalid devices: Device validation failed for “eth1”: Failed loading device “eth1”: Unsupported device type

lxc config device add routeros eth2 nic nictype=physical parent=enp2s0f0
error:
Failed to start device “eth2”: lstat /sys/bus/pci/devices/0000:02:00.0/iommu_group: no such file or directory

I need to use a Physical port to manage the outconnections from LXD VM… can be done?

[update]

I create a bridge using bridge-utils over the physical port. and later create a network using lxc network create and add device to the VM. exist another way to do this?

2

With virtual machines, using nictype physical means you’d be passing through the actual PCI-E device to the virtual machines, not just an network-interface, and for that you need to enable IOMMU. The virtual machine would then be using the PCI-E device directly, just like any non-virtualized machine would.

So, you need to enable IOMMU first, then you need to check, if the NIC you’re trying to pass through is in an IOMMU-group of its own, or if it’s grouped with other devices. If it is, that’s going to be another problem.

The Arch Linux wiki-page isn’t specifically for LXD, but it is still useful, since the same instructions apply: PCI passthrough via OVMF - ArchWiki

2 Likes
3

Thanks, just above on that page is how to enable it. Which maybe all you need to do.

https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF#Enabling_IOMMU

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